The doctor also alleged that he made the letter up as he went along as he was rushed for time and claimed in September 2016 that the words were his own.

Dr Bornstein told American press that "[Trump] dictated the letter and I would tell him what he couldn't put in there".

A second letter was released later in the presidential campaign when Trump's health was questioned which gave a more business-like assessment including the President's height, weight and prescription medications.

The White House have yet to confirm or deny the doctors allegations.

What did it say about his health?

The letter crowed about Trump's "astonishingly excellent health" and claimed he had lost 15 pounds over the previous year.

It also added the president had "excellent" cardiovascular health and that he had no forms of cancer or joint surgery.

Dr Bornstein even claimed in the letter that: "If elected, Mr Trump, I can state unequivocally, will be the healthiest individual ever elected to the presidency."

The letter also commended Trump for having "extraordinary" physical strength and stamina.